Pedro was no doubt enjoying a quiet moment amid the furor surrounding Sunday night's shock Games Of Thrones episode.

In the battle to the death between Prince Oberyn (Pedro), aka The Viper - who was representing Tyrion Lannister - and the man twice his size dubbed The Mountain, the tables were turned on the would-be victor when rather than finishing his sizeable competitor off, he waited for a confession from the beast that he indeed raped and killed his sister and murdered her children.

The Prince then was killed in the most dramatic of fashions, leaving everyone in utter disbelief - especially Tyrion (Peter Dinklage), who is now sentenced to death for losing the fight.

'He needs a confession. He needs to hear it': The Prince, who is nicknamed The Viper, came so close to being the victor, but his need to get a confession out of Gregor Clegane that he brutally raped and killed his sister before killing her children ultimately led to his downfall

He's still smiling! While the pair's size difference was impossible to miss, the agile Prince ran circles around his hulking competitor, choosing only to wear light armour so that he wouldn't be slowed down

Weighing in on Sunday night's shocking episode, Pedro told Vulture that what he believes people love so much about the HBO series is the 'brutal honesty', which he says is 'uncompromising'.

'I got all 10 episodes of the season before I flew out to Europe, and I read them voraciously. I'm a fan of the show, and I was reading them like a regular fan at first, you know? And I read all the episodes back to back, really, really quickly,' he told the website.

The mistake that will end his life: Pedro explains of his character's fateful decision to hold out for a confession rather than finish off his opponent, 'Ultimately, it is about defeating this man who raped and killed his sister, but before he can do that, he needs a confession'

Skull-crusher! The 400lb Mountain got the better of his opponent, crushing his skull as he plunged his thumbs into the Prince's eye sockets

'And when I got to my final episode, I was really impressed by how similar it was to the scene in the books.'

With
the scene requiring Hafþór to look as if he could easily crush a man's
skull with his bare hands, Pedro reveals it wasn't too much of a feat
for the burly actor.

'Hafþór
was competing in a strongman competition in China, and he came back
with the title of third strongest man in the world! That's pretty
impressive. Our stunt coordinator told me, "Just so you know, he's the
third strongest man in the world. It's official."

A bloody mess: The Mountain did confess to raping and killing the Prince's sister, Elia Martell, before bragging that he crushed her skull just like he was about to do to him

'Don't
leave me alone in this world': Prince Oberyn's distraught girlfriend,
Ellaria Sand (Indira Varma), looked on in utter disbelief and shock as
her lover was killed in front of her eyes

'We had a lot of fun,' he continued. 'It was still really, really challenging, and I was totally intimidated, and I wanted to get it right - for the readers, for the production, and for me. And everything lined up in my favour. Stepping into it was a really scary thing, but the doing of it was the most fun I ever had. It was nuts! With hundreds of extras watching, a lot of the main characters watching. It was big.'

Giving his opinion as to what his character did wrong to end up being defeated, he tells Entertainment Weekly it was 'getting too close and being too far delivered by his own passions'.

'Because ultimately, it is about defeating this man who raped and killed his sister, but before he can do that, before he can end this man's life, he needs a confession,' he explained. 'He needs to hear it. And interestingly, I had this great conversation with Lena Headey about Oberyn's journey, and how even though it ends badly, he still hears the confession, you know? I don't even need to go on after that once it's been said out loud.'

Death sentence: With Prince Oberyn losing the battle which he was fighting on the behalf of Tyrion Lannister (Peter Dinklage), the 'imp' is now sentenced to death for the murder of nephew King Joffrey (Jack Gleeson)